A small office manager wants to buy new cordless phones for each of the office's 11 desks. Each phone costs $89.99. Estimate the total cost by using numbers with one nonzero digit.
Find the exact amount.
A)$900; $989.89
B)$800; $989.89
C)$800; $989.99
D)$900; $898.98

Question

Quizplus · Accepted Answer

Using numbers with only one nonzero digit, we can estimate $89.99$ as $90$. Therefore, the total cost of 11 phones is approximately $11 	imes 90 = 990$. The only option that comes close to this estimate is A: $900; $989.89. However, we can find the exact amount by multiplying 11 by 89.99: $11 	imes 89.99 = 989.89$. So the exact amount is $989.89$, which matches option A.

A Small Office Manager Wants to Buy New Cordless Phones